Football referee cards: referee cards set includes red and yellow cards, pencil, paperback with game score plan cards inside and a metal trainer whistle with a lanyardSize: size of the red and yellow cards are 11 x 7 cm / 4.3 x 2.75 inches; the metal referee whistle is 4 x 1.5 cm / 1.57 x 0.6 inches; the folded size of the referee wallet is 8.3 x 12 cm / 3.27 x 4.7 inchesMetal referee whistle: stainless steel referee whistle with nylon lanyard; yellow ball helps to adjust the length of the lanyard to fit your neck sizeReferee wallet: the wallet holds a red and yellow plastic warning card and is easy to bend back and not easily folded brokenSpecial and simple design: special wallet design allows referees to take cards easily and quickly; and this referee card set and trainer whistle easily in your pocket